Indian shuttler Saina Nehwal, who made an early exit from the Rio Olympic Games, will undergo a knee surgery in Mumbai on Saturday.

Saina, the 2012 London Games bronze medallist, tweeted a picture of her prescription page, announcing the surgery time at a city hospital.

"Surgery tomorrow (Saturday) morning at 6 am friends pls pray for me," Saina tweeted.

Saina had lost in the Group stage after suffering a straight game defeat against Ukraine's Marija Ulitina in the second match. She later revealed that she had a inflammation on her right knee.

"You have the right doctor doing it ... Feel better," tweeted former tennis star Mahesh Bhupathi in response to Saina's post.